11629381 has 2 divisors, whose sum is σ = 11629382. Its totient is φ = 11629380.

The previous prime is 11629369. The next prime is 11629399. The reversal of 11629381 is 18392611.

11629381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11621281 + 8100 = 3409^2 + 90^2 .

It is an emirp because it is prime and its reverse (18392611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11629381 - 2⁷ = 11629253 is a prime.

It is a super-2 number, since 2×11629381² = 270485004886322, which contains 22 as substring.

It is equal to p₇₆₅₃₂₈ and since 11629381 and 765328 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11629181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5814690 + 5814691.

It is an arithmetic number, because the mean of its divisors is an integer number (5814691).

Almost surely, 2^11629381 is an apocalyptic number.

It is an amenable number.

11629381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11629381 is an equidigital number, since it uses as much as digits as its factorization.

11629381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 11629381 is about 3410.1878247393. The cubic root of 11629381 is about 226.5611982898.

The spelling of 11629381 in words is "eleven million, six hundred twenty-nine thousand, three hundred eighty-one".